The amplitude of a particle executing SHM is 4 cm. At the mean position, the speed of the particle is 16 `cms^(-1)`. The distance of the particle from the mean position at which the speed of the particle becomes `8 sqrt(3) cms^(-1)` will be
A. `2sqrt3` cm
B. `sqrt3` cm
C. 1 cm
D. 2 cm